Abstract
The need of lightweight vehicle design is motivated by the recent global trend of less fuel consumption and lower emission in vehicle. However in NVH development of vehicle, it becomes more difficult for the light weight vehicle to reach low vibro-acoustic sensitivity than, for the heavy weight one to do so.
In this environment, this paper describes about the practical finite element (FE) modeling of vehicle structure and acoustics, in order to predict boom response to powertrain excitation. The FE modeling process through validation and updating with experimental mode makes, the accumulation of considerable expertise for improving prediction accuracy, possible. FE analysis based on this modeling process is so useful for predicting boom level up to 200Hz. Using the result of FE analysis, structural optimization is executed in order to improve boom level of 80Hz.